Last season: 61-21, lost to New York in Eastern Conference semifinals.

COACH: Joe Mazzulla (fourth season, 182-64).

SEASON OPENER: Oct. 22 vs. Philadelphia.

DEPARTURES: G Jrue Holiday, F/C Kristaps Porzingis, F/C Al Horford, C Luke Kornet.

ADDITIONS: G Anfernee Simons, F Chris Boucher, C Luka Garza, G Hugo González, C Amari Williams

BetMGM championship odds: 18-1.

The Celtics aren’t a favorite to emerge from the East coming off a failed NBA title defense last season that ended with a conference semifinals loss to New York. It also included he loss of star Jayson Tatum to a ruptured right Achilles tendon, an injury that will sideline him for the foreseeable future.

That was the start of an offseason full of change that included Boston trading both Jrue Holiday and Kristaps Porzingis

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